void SImage::initData()
{
setBitMasks();
BitsPerPixel = getBitsPerPixelFromFormat(Format);
BytesPerPixel = BitsPerPixel / 8;
// Pitch should be aligned...
Pitch = BytesPerPixel * Size.Width;
if (!Data)
Data = new s8[Size.Height * Pitch];
}
//! copies this surface into another, scaling it to the target image size
// note: this is very very slow.
void CImage::copyToScaling(void* target, u32 width, u32 height, ECOLOR_FORMAT format, u32 pitch)
{
if (!target || !width || !height)
return;
const u32 bpp=getBitsPerPixelFromFormat(format)/8;
if (0==pitch)
pitch = width*bpp;
if (Format==format && Size.Width==width && Size.Height==height)
{
if (pitch==Pitch)
{
memcpy(target, Data, height*pitch);
return;
}
else
{
u8* tgtpos = (u8*) target;
u8* srcpos = Data;
const u32 bwidth = width*bpp;
const u32 rest = pitch-bwidth;
for (u32 y=0; y<height; ++y)
{
// copy scanline
memcpy(tgtpos, srcpos, bwidth);
// clear pitch
memset(tgtpos+bwidth, 0, rest);
tgtpos += pitch;
srcpos += Pitch;
}
return;
}
}
const f32 sourceXStep = (f32)Size.Width / (f32)width;
const f32 sourceYStep = (f32)Size.Height / (f32)height;
s32 yval=0, syval=0;
f32 sy = 0.0f;
for (u32 y=0; y<height; ++y)
{
f32 sx = 0.0f;
for (u32 x=0; x<width; ++x)
{
CColorConverter::convert_viaFormat(Data+ syval + ((s32)sx)*BytesPerPixel, Format, 1, ((u8*)target)+ yval + (x*bpp), format);
sx+=sourceXStep;
}
sy+=sourceYStep;
syval=((s32)sy)*Pitch;
yval+=pitch;
}
}
//! Returns bits per pixel.
UINT32 CImage::getBitsPerPixel() const
{
return getBitsPerPixelFromFormat(Format);
}